A Big Surprise from the Edge of the Solar System
June 9, 2011: NASA's Voyager probes are truly going where no one has gone before. Gliding silently toward the stars, 9 billion miles from Earth, they are beaming back news from the most distant, unexplored reaches of the solar system.
Mission scientists say the probes have just sent back some very big news indeed.
It's bubbly out there.
"The Voyager probes appear to have entered a strange realm of frothy magnetic bubbles," says astronomer Merav Opher of Boston University. "This is very surprising."
"The sun's magnetic field extends all the way to the edge of the solar system," explains Opher.
"Because the sun spins, its magnetic field becomes twisted and wrinkled, a bit like a ballerina's skirt.
Far, far away from the sun, where the Voyagers are now, the folds of the skirt bunch up."
Posted: 9:51:51 AM
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